diff options
Diffstat (limited to 'drivers/s390/cio/vfio_ccw_cp.h')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_cp.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.h b/drivers/s390/cio/vfio_ccw_cp.h new file mode 100644 index 000000000..54d26e242 --- /dev/null +++ b/drivers/s390/cio/vfio_ccw_cp.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * channel program interfaces + * + * Copyright IBM Corp. 2017 + * + * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> + * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com> + */ + +#ifndef _VFIO_CCW_CP_H_ +#define _VFIO_CCW_CP_H_ + +#include <asm/cio.h> +#include <asm/scsw.h> + +#include "orb.h" +#include "vfio_ccw_trace.h" + +/* + * Max length for ccw chain. + * XXX: Limit to 256, need to check more? + */ +#define CCWCHAIN_LEN_MAX 256 + +/** + * struct channel_program - manage information for channel program + * @ccwchain_list: list head of ccwchains + * @orb: orb for the currently processed ssch request + * @mdev: the mediated device to perform page pinning/unpinning + * @initialized: whether this instance is actually initialized + * + * @ccwchain_list is the head of a ccwchain list, that contents the + * translated result of the guest channel program that pointed out by + * the iova parameter when calling cp_init. + */ +struct channel_program { + struct list_head ccwchain_list; + union orb orb; + bool initialized; + struct ccw1 *guest_cp; +}; + +int cp_init(struct channel_program *cp, union orb *orb); +void cp_free(struct channel_program *cp); +int cp_prefetch(struct channel_program *cp); +union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm); +void cp_update_scsw(struct channel_program *cp, union scsw *scsw); +bool cp_iova_pinned(struct channel_program *cp, u64 iova, u64 length); + +#endif |